CN206739279U - A kind of more gradient burners of the high effect cleaning of coal - Google Patents
A kind of more gradient burners of the high effect cleaning of coal Download PDFInfo
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- CN206739279U CN206739279U CN201720261738.2U CN201720261738U CN206739279U CN 206739279 U CN206739279 U CN 206739279U CN 201720261738 U CN201720261738 U CN 201720261738U CN 206739279 U CN206739279 U CN 206739279U
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- gradient
- coal
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- burners
- heater
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Abstract
Coal dust high performance clean burning technical field is the utility model is related to, a kind of device of coal dust high performance clean burning is disclosed, NOx, SO can be significantly reduced in the case where not taking end treatment measure2And the discharge of particulate matter, described device include following eight parts：More gradient burner bodies of heater, enter coal charging aperture, air port, igniter burner, pressure relief opening, deslagging chamber, flue, peep hole.Compared with existing coal-firing device, the utility model is except coal dust firing is abundant, the thermal efficiency is high, in addition to flameholding, is mainly characterized by with source and process contaminant restraining SO2With NOx caused by new technology, reach the purposes of energy-saving and emission-reduction, another feature is that this burner can also carry out process modification to the liquid cinder for discharging burner, cinder is possessed the composition for preparing high value added product, reaches the purpose of near-zero release.The convenience for device maintenance, operation is simple and direct, has a good application prospect and environmental economic value.
Description
Technical field
It the utility model is related to coal combustion green technology, a kind of category combustion enginnering field, there is provided source under hot conditions
Suppress dust, NOx and SO2Caused burner.
Background technology
China is the coal production of maximum and country of consumption, and few in number using coal as main one in the world in the world
One of country of the secondary energy (coal accounts for the 67% of national energy consumption).Currently, coal provides more than 70% generating combustion for China
Material, 60% industrial chemicals and 80% domestic fuel.Root is it was predicted that even if to the year two thousand fifty, coal still accounts for more than 50%.
Pollution caused by fire coal is to restrict a key factor of Chinese national economy and social sustainable development, also into
For in the world, particularly neighboring countries and regions are to the Chinese focus paid close attention to, if do not taken strong control measures, such as Jing-jin-ji region
This situation of haze can will also accelerate to deteriorate.
The SO that China's coal combustion is discharged2Account for 85%, the CO that the whole nation is always discharged2Account for 85%, NOx and account for 60%, dust
70% has been accounted for, has been recorded according to China Statistical Yearbook in 2015, China's 1740.75 ten thousand tons of smoke discharge amount in 2014, SO2Discharge capacity
1974.42 ten thousand tons, 2078.00 ten thousand tons of NOx discharge, environmental pollution caused by coal burning is to restrict China's sustainable development
A key factor.China acid rain disaster area constantly expands, in addition, the discharge of heavy metal and PM2.5 increasingly increases, to people
The health and ecological environment of class bring huge harm.
For conventional coal combustion technology, NOx is mainly produced by fuel type constructive ways.NOx generation with destroy with
Following factor is relevant：(1) burning of coal mode, combustion conditions, its yield are horizontal dependent on ignition temperature；(2) coal characteristic；
(3) in burner hearth reaction zone flue gas atmosphere, i.e., oxygen in flue gas, nitrogen, NO content；(4) fuel and fuel Products are in flame
Residence time in high-temperature region and burner hearth；SO2Generation mostly come from sulfur content in coal, SO caused by sulphur coal2Certainly will
Can be more.
Conventional combustion technology has swirl flow combustion and straight flow combustion, and spiral-flow powdered coal burning technology has wide in China
Using, the large sized unit especially gone into operation in recent years, use spiral-flow powdered coal burning technology more, compared to straight flow combustion technology,
There is following advantage using vortex burner boiler：(1) it can avoid using overheated zone heat caused by DC burner
Deviation；(2) each burner independent body burning, does not influence each other, start and stop are convenient；(3) it is not strict to burner hearth shape
Requirement, be advantageous to the arrangement of afterbody convection heating surface；(4) burner is evenly arranged in front wall or rear wall, inputs the heat of burner hearth
Amount distribution also than more uniform, reduce combustion zone in the middle part of burner hearth because temperature drift and caused by slagging possibility；(5) when unit holds
During amount increase, it only need to accordingly increase furnace width and increase burner number of elements and row, it is not necessary to the close square of burner hearth, simultaneously
The thermal power of single burner can not have to increase yet.
It is deteriorated with increasingly serious and China's steam coal of environmental problem, for the pot using spiral-flow powdered coal burning technology
Stove unit, NOx discharge is reduced, coal adaptability is improved, prevent boiler scaling and ensures the safe and stable operation of boiler loom
It is more and more important.Develop and possess our intellectual properties, the high-efficiency cyclone combustion technology for adapting to China's ature of coal is very
It is necessary.
Utility model content
Technical problem to be solved in the utility model is：A kind of coal efficiently utilizes combustion of more gradient burners in coal
The emission reduction of pollutant and the efficient utilization of the energy are realized during burning.Thought of the present utility model is to realize the process of pollutant
Control, reduce NOx, SO2And the discharge of particulate matter, realize that the clean and effective of coal utilizes.
A kind of more gradient burners of coal dust high effect cleaning, it is characterised in that more gradient burners are burnt by more gradients to be filled
Put combustion chamber and deslagging chamber's composition；Fenestra is observed in more gradient burner combustion chambers by top cover, pressure relief opening, igniter burner, burning,
Air port, vortex furnace, flue, more gradient burner bodies of heater are formed；Wherein, 6 pairs built in more gradient burner bodies of heater into
Centrosymmetric air port, respectively primary air nozzle from high to low, overfiren air port, tertiary air orifice, four air ports, five air ports, six
Secondary air port；Primary air nozzle front end is provided with coal feed point and air blast injection tube.
It is welded steel structure outside further more gradient burner bodies of heater, inside forms for refractory material casting；Together
When more gradient burner top of combustion chamber be provided with back taper bench-type top cover.
Further in the vertical, more gradient burner Proper Designs are into six sections of movable fractionation, and can be according to reality
Border requirement adjusts the height and inlet number of more gradient burner bodies of heater, and at the top of more gradient burner bodies of heater
Install preheating chamber additional；In burning segment trailer, the flue provided with a section in cylinder, flue is located at more gradient burner bodies of heater
Afterbody, internal layer are equipped with refractory material.
Further deslagging chamber is made up of deslagging chamber's peep hole, liquid flow hole, slag blocking wall, deslagging chamber's bottom plug；Wherein, slag blocking wall
Poured and formed by refractory material with deslagging chamber bottom plug, it is rectangular；The circle progressively to reduce from the inside to the outside is presented in mud hole.
A kind of application method of the more gradient burners of high effect cleaning as described above, it is characterised in that：First, addition
Agent, coal dust are transported in more gradient burner combustion chambers by coal feed point with air from primary air nozzle, and are fired along more gradients
Burn device combustion chamber and stable thermograde, phase concentrations gradient, solid particle size are formed from wall to center, from the top to the bottom
With the combustion space of flow gradients, meanwhile, lighted in the ignited burner of more gradient burner combustion chamber top coal dusts, with combustion
The progress of burning, the temperature in more gradient burner combustion chambers gradually rise, the remaining coal ash of coal dust after-flame by high temperature melt simultaneously
Drop into deslagging chamber；
Wherein, part combustion air carries solid sulphur nitrogen fixation agent, cinder modification agent and coal dust and passes through primary air nozzle as carrier
It is transported in more gradient burner combustion chambers, remaining remaining combustion air and oxygen are according to different proportion respectively from Secondary Air
Mouth 2, tertiary air orifice, four air ports, five air ports, six times air ports enter combusting coal fines in combustion chamber；
The lime-ash melted in deslagging chamber, a part of liquid cinder is a part of not melt from mud hole discharge in combustion
Melt lime-ash to discharge by deslagging chamber's bottom plug after certain time is accumulated.
Further by adjust six pairs of air inlets on more gradient burner bodies of heater come and addition suitably admittedly sulphur
Nitrogen fixation agent, cinder modification agent reach high performance clean burning and prepare height and add to control the combustion atmosphere of coal dust and modification cinder
It is worth the purpose of product.
Further during burning, mud hole is blocked using amorphous refractory clay when not in use, fire proofed wood
Material can block duct by itself sintering, to prevent the Self-discharged of slag liquid；Deslagging chamber's bottom plug is made up of high-temperature refractory,
It is fixed in combustion by nut on furnace wall, deslagging chamber's bottom plug is extracted after a period of time of burning, and is cleared up grey in deslagging chamber
Slag.
The utility model has the advantages that：Coal dust realized in the combustion process of burner hearth nitrogen oxides, sulfur dioxide and
The reduction of the growing amount of grain thing, the cleaning burning of coal dust is realized while coal dust efficient burning, on the one hand improves boiler
Efficiency of combustion, the purpose of energy-conservation is realized, another side, reduces the discharge of pollutant, has reached emission reduction effect.The device is applicable
Scope is wide, available for the burning of a variety of coals, equally has preferable combustion efficiency for coal inferior.
Brief description of the drawings
Fig. 1 is the front view of the utility model device
Fig. 2 is Fig. 1 A-A profiles
Fig. 3 is Fig. 1 B-B profiles
Fig. 4 is the profile of primary air nozzle 4
Label represents in accompanying drawing：1st, top cover, 2, pressure relief opening, 3, body of heater shell, 4, primary air nozzle, 5, overfiren air port, 6, three
Secondary air port, 7, four air ports, 8, five air ports, 9, six air ports, 10, more gradient burner combustion chambers, 11, liquid flow hole, 12,
Flue, 13, high-temperature refractory layer, 14, insulation refractory layer, 15, top cover handle, 16, deslagging chamber, 17, igniter burner,
18th, burning observation fenestra, 19, bottom plug handle, 20, deslagging chamber's peep hole, 21, more gradient burner bodies of heater, 22, slag blocking wall,
23rd, deslagging chamber's bottom plug, 24, coal feed point, 25, air blast injection tube.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail, but the scope of protection of the utility model and should
Following examples are not limited to scope：
Embodiment 1：
Bituminous coal, ball milling cross 200 mesh standard sieves, particle diameter<0.075mm, content of ashes 12.27%.
Be passed through liquefied petroleum gas and air into igniter burner 17, light the admixture of gas, heat caused by burning by
Gradually preheat furnace interior space and refractory material.Treat at Secondary Air section that temperature is gradually increased to 750~800 DEG C, temperature at tertiary air section
Degree is gradually increased to 650~750 DEG C, by coal feed point 24 and air blast injection tube 25, from primary air nozzle 4 into burner hearth coal injection.
In the presence of igniter burner 17, the coal dust sprayed into stove is ignited, and each regional temperature further raises in burner hearth.Control coal dust
Injection amount is 20~40kg/h, and total blow rate required is 280~350m3/ h, after being blown burn and reach stable after a while, one
Temperature at secondary air port 4 can stablize the temperature at 1200~1300 DEG C, tertiary air orifice 6 and can stablize at 1410~1450 DEG C, flue
12 temperature can be stablized at 1100~1150 DEG C.The afterbody nitrous oxides concentration scope of flue 12 is 400~800mg/m3, titanium dioxide
The concentration range of sulphur is 200~900mg/m3, PM2.5 concentration is 40~100mg/m in particulate matter3。
Embodiment 2：
Bituminous coal and anthracite, ball milling cross 200 mesh standard sieves, particle diameter<0.075mm, bituminous coal content of ashes 12.27%, smokelessly
Ash content of coal content 15.8%.
Be passed through liquefied petroleum gas and air into igniter burner 17, light the admixture of gas, heat caused by burning by
Gradually preheat furnace interior space and refractory material.Treat at Secondary Air section that temperature is gradually increased to 750~800 DEG C, temperature at tertiary air section
Degree is gradually increased to 650~750 DEG C, by coal feed point 24 and air blast injection tube 25, is blown from primary air nozzle 4 into burner hearth according to one
The bituminous coal and anthracitic mixed coal powder of certainty ratio mixing.In the presence of igniter burner 17, the coal dust sprayed into stove is ignited,
Each regional temperature further raises in burner hearth.In combustion with addition of a certain amount of oxygen at overfiren air port 5 and five air ports 8
Gas.It is 30~40kg/h to control coal powder blowing amount, and total blow rate required is 280~400m3/ h, burn and reach through being blown after a while
To after stabilization, the temperature at primary air nozzle 4 can stablize the temperature at 1450~1500 DEG C, tertiary air orifice 6 can stablize 1500~
1550 DEG C, the temperature of flue 12 can be stablized at 1150~1200 DEG C.The afterbody nitrous oxides concentration scope of flue 12 be 500~
700mg/m3, the concentration range of sulfur dioxide is 800~1600mg/m3, PM2.5 concentration is 20~100mg/m in particulate matter3。
Embodiment 3：
Bituminous coal and anthracite, ball milling cross 200 mesh standard sieves, particle diameter<0.075mm, bituminous coal content of ashes 12.27%, smokelessly
Ash content of coal content 15.8%, additive, ball milling cross 200 mesh standard sieves.
Be passed through liquefied petroleum gas and air into igniter burner 17, light the admixture of gas, heat caused by burning by
Gradually preheat furnace interior space and refractory material.Treat at Secondary Air section that temperature is gradually increased to 750~800 DEG C, temperature at tertiary air section
Degree is gradually increased to 650~750 DEG C, by coal feed point 24 and air blast injection tube 25, is blown from primary air nozzle 4 into burner hearth according to one
The bituminous coal and anthracite of certainty ratio mixing and the mixed coal powder for adding certain additive.In combustion in overfiren air port 5
With at five air ports 8 with addition of a certain amount of oxygen.In the presence of igniter burner 17, the coal dust sprayed into stove is ignited, burner hearth
Interior each regional temperature further raises.It is 30~40kg/h to control coal powder blowing amount, and total blow rate required is 280~350m3/ h, pass through
After a period of time injection is burnt and reaches stable, the temperature at primary air nozzle 4 can be stablized at 1450~1500 DEG C, tertiary air orifice 6
Place's temperature can be stablized at 1500~1550 DEG C, and the temperature of flue 12 can be stablized at 1150~1200 DEG C.The afterbody nitrogen oxidation of flue 12
Thing concentration range is 400~700mg/m3, the concentration range of sulfur dioxide is 800~1200mg/m3, PM2.5 concentration in particulate matter
For 20~100mg/m3。
Claims (4)
1. a kind of more gradient burners of the high effect cleaning of coal, it is characterised in that more gradient burners are by more gradient burners
Combustion chamber (10) and deslagging chamber (16) composition；More gradient burner combustion chambers (10) are burnt by top cover (1), pressure relief opening (2), point
Mouth (17), burning observation fenestra (18), air port, vortex furnace, flue (12), more gradient burner bodies of heater (21) are formed；Its
In, in 6 pairs of air ports in a center of symmetry built in more gradient burner bodies of heater (21), respectively primary air nozzle (4) from high to low,
Overfiren air port (5), tertiary air orifice (6), four air ports (7), five air ports (8), six air ports (9)；Primary air nozzle (4) front end is set
There are coal feed point (24) and air blast injection tube (25).
A kind of 2. more gradient burners of the high effect cleaning of coal as claimed in claim 1, it is characterised in that more gradient burners
It is welded steel structure that body of heater (21) is outside, and inside forms for refractory material casting；Simultaneously in more gradient burner combustion chambers
(10) top is provided with the top cover (1) in back taper bench-type.
3. the more gradient burners of the high effect cleaning of a kind of coal according to claim 1 or 2, it is characterised in that in longitudinal direction
On, more gradient burner bodies of heater (21) are designed to six sections of movable fractionation, and can be adjusted according to actual operation requirements more terraced
The height and inlet number of burner body of heater (21) are spent, and installs preheating additional at the top of more gradient burner bodies of heater (21)
Room；In burning segment trailer, the flue (12) provided with a section in cylinder, flue is located at more gradient burner bodies of heater (21)
Afterbody, internal layer are equipped with refractory material.
A kind of 4. more gradient burners of the high effect cleaning of coal according to claim 1, it is characterised in that：Deslagging chamber (16)
It is made up of deslagging chamber's peep hole (20), liquid flow hole (11), slag blocking wall (22), deslagging chamber's bottom plug (23)；Wherein, slag blocking wall (22) and
Deslagging chamber's bottom plug (23) is poured by refractory material to be formed, rectangular；Liquid flow hole (11) is presented progressively to be reduced from the inside to the outside
It is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720261738.2U CN206739279U (en) | 2017-03-17 | 2017-03-17 | A kind of more gradient burners of the high effect cleaning of coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720261738.2U CN206739279U (en) | 2017-03-17 | 2017-03-17 | A kind of more gradient burners of the high effect cleaning of coal |
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| Publication Number | Publication Date |
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| CN206739279U true CN206739279U (en) | 2017-12-12 |
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|---|---|---|---|
| CN201720261738.2U Expired - Fee Related CN206739279U (en) | 2017-03-17 | 2017-03-17 | A kind of more gradient burners of the high effect cleaning of coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871114A (en) * | 2017-03-17 | 2017-06-20 | 北京科技大学 | A kind of many gradient burners of the high effect cleaning of coal and its application method |
-
2017
- 2017-03-17 CN CN201720261738.2U patent/CN206739279U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871114A (en) * | 2017-03-17 | 2017-06-20 | 北京科技大学 | A kind of many gradient burners of the high effect cleaning of coal and its application method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20190317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |